東農(nóng)-2玉米改良群體部分數(shù)量性狀的遺傳分析.pdf

1、東北農(nóng)業(yè)大學碩士學位論文東農(nóng)2玉米改良群體部分數(shù)量性狀的遺傳分析姓名：張曉峰申請學位級別：碩士專業(yè)：作物遺傳育種指導教師：金益2000.5.1碩士論文東農(nóng)2玉米改良群體部分數(shù)量性狀的遺傳分析東北農(nóng)業(yè)大學GENETICANALYSIS0FTHEQUANTITYTRAITSOFTHElMPRoVINGMAIZEPoPULATIoNNEAU2ZhangxiaofengAbstractNineteenquantitytraitsofaimpro

2、vedmaizepopulationNEAU一2wasstudiedbythemeansofTripleTestCrossdesignTheobjectiveofthisstudywastodeterminegeneticvariabilityandgeneticmodelofthesetraitscleargeneaction，whichcontributetotheexpressionofheternsis，andinformthe

3、geneticpotentialityofthispopulationThispopulationcouldimprovedandexploitedmoreeffectivelybasedonthesealialysisTheanalysisofTripleTestCrossdesignsuggestedthat，additiveeffectplayanimportantroleinallofthetraitsoxceptfilling

4、propertytraitV1Dominanceeffectissignificantatplantheight，earheight，leafnumberaboveearkemelrowsandtotalleat“areasEpistasiseffectissignificantatplantheight，earheight，earlength，kernelrows，kernelsperrOWkernelsperearandkernel

5、sweightperonehundredGeneticeffectofplantheight，earheightandrowsisdeterminedbyallthreekindsofgeneeffectsGeneticeffeetofearlength，kernelsperrowkernelsperearandkernelsweightperonehundredisdeterminedbyadditiveeffectandepista

6、siseffectTheothertraitsaredeterminedbyadditiveeffectprimarilyTheestimatesofgeneticvariationsshowedthat，additivegeneticcomponentisver)7bigamongalltraitsMosttraitssuchasgrainyield，earlength，kernelrows，kernelsperearadditive

7、variationproportionexceed85percent，especiallyingrainyield，itachieve9220percentSo，fortheimprovedbreedingpopulationwhichaimsatraisinggrainyield，excellentinbredlineswithhighgeneralcombiningabilitywillbeselectedatearlyperiod

8、Inthecourseofbreeding，thepopulationwillbecarriedoutrecurrentselectionandseparateinbredlinestocrossatthesametimeinordertofastenbreedingprogressGeneticpotentialityofthepopulationsuggestedthat，variationcoefficientofgrainyie

9、ldisachieved2121percentandexpectgeneticadvanceisachieved1929percent，itcanbesaidthatthepopulationstudiedhasgreatpotentialityingrainyieldCorrelationanalysisshowedthat，grainyieldiscorrelatedwitheartraitsandshapetraits，SOthe